Park, Junsu Seo, Jung-Hun Yeom, Seung-Won Yao, Chunhua Yang, Vina W. Cai, Zhiyong Jhon, Young Min Ju, Byeong-Kwon 2024-01-19T22:34:34Z 2024-01-19T22:34:34Z 2021-09-03 2018-05-07 2195-1071 https://pubs.kist.re.kr/handle/201004/121380 This work demonstrates flexible, transparent phototransistors that can detect visible light with nontoxic organic active materials on biodegradable substrates toward environment-friendly electronics. The molybdenum trioxide (MoO3)-buffered indium zinc oxide as high-performance hole injector and transparent electrodes is applied for the first time to organic phototransistors on cellulose nanofibrillated fiber substrates to achieve more than 70% of transmittance in the visible range (400-750 nm) while showing high conductivity under multiple bendings. Excellent electrical switching characteristics are obtained from transistors using a pentacene active layer with a saturation mobility value of 1.40 cm(2) V-1 s(-1). The phototransistors, which can detect visible light and perform in two operation modes, exhibit a maximum responsivity of 54.8 A W-1 and a photosensitivity of 24.4 under white light illumination at an intensity of 0.12 mW cm(-2). Moreover, the devices show a stable operation during mechanical bending tests with radii ranging from 100 to 5 mm and cyclic bending tests of up to 2000 cycles at a fixed radius of 5 mm. The results suggest that these flexible phototransistors with properties of transparency and biodegradability have considerable potential for use in low-cost and eco-friendly disposable sensor systems. English WILEY-V C H VERLAG GMBH FIELD-EFFECT TRANSISTORS THIN-FILM TRANSISTORS HIGHLY TRANSPARENT PENTACENE ELECTRONICS PHOTODIODES TRANSIENT NANOPAPER BILAYER GREEN Flexible and Transparent Organic Phototransistors on Biodegradable Cellulose Nanofibrillated Fiber Substrates Article 10.1002/adom.201701140 1 ADVANCED OPTICAL MATERIALS, v.6, no.9 ADVANCED OPTICAL MATERIALS 6 9 scie scopus 000431961300002 2-s2.0-85042429050 Materials Science, Multidisciplinary Optics Materials Science Optics Article FIELD-EFFECT TRANSISTORS THIN-FILM TRANSISTORS HIGHLY TRANSPARENT PENTACENE ELECTRONICS PHOTODIODES TRANSIENT NANOPAPER BILAYER GREEN biodegradation flexible sensors indium zinc oxide electrodes organic phototransistors thin-film transistors